/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) [2016-2021] Payara Foundation and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://github.com/payara/Payara/blob/main/LICENSE.txt
 * See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at legal/OPEN-SOURCE-LICENSE.txt.
 *
 * GPL Classpath Exception:
 * The Payara Foundation designates this particular file as subject to the "Classpath"
 * exception as provided by the Payara Foundation in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
package fish.payara.micro.cdi.extension.cluster;

import com.sun.enterprise.container.common.impl.util.ClusteredSingletonLookupImplBase;
import static com.sun.enterprise.container.common.spi.ClusteredSingletonLookup.SingletonType.CDI;
import fish.payara.cluster.Clustered;
import static fish.payara.micro.cdi.extension.cluster.ClusterScopeContext.getAnnotation;
import static fish.payara.micro.cdi.extension.cluster.ClusterScopeContext.getBeanName;
import java.util.Set;
import java.util.concurrent.atomic.AtomicReference;
import jakarta.enterprise.inject.spi.Bean;
import jakarta.enterprise.inject.spi.BeanManager;

/**
 * implements CDI-based clustered singleton lookups
 *
 * @author lprimak
 */
public class ClusteredSingletonLookupImpl extends ClusteredSingletonLookupImplBase {
    private final BeanManager beanManager;
    private final AtomicReference<String> sessionKey = new AtomicReference<>();

    public ClusteredSingletonLookupImpl(BeanManager beanManager, String componentId) {
        super(componentId, CDI);
        this.beanManager = beanManager;
    }

    @Override
    public String getClusteredSessionKey() {
        return sessionKey.get();
    }

    void setClusteredSessionKeyIfNotSet(Class<?> beanClass, Clustered clusteredAnnotation) {
        sessionKey.updateAndGet(v -> v != null ? v : makeSessionKey(beanClass, clusteredAnnotation));
    }

    private String makeSessionKey(Class<?> beanClass, Clustered clusteredAnnotation) {
        Set<Bean<?>> managedBeans = beanManager.getBeans(beanClass);
        if (managedBeans.size() > 1) {
            throw new IllegalArgumentException("Multiple beans found for " + beanClass);
        }
        if (managedBeans.size() == 1) {
            Bean<?> bean = managedBeans.iterator().next();
            return getBeanName(bean, getAnnotation(beanManager, bean));
        }
        return ClusterScopeContext.firstNonNull(clusteredAnnotation.keyName(), beanClass.getName());
    }
}
